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. .. ,A..g14,-195s Page12.TheGuardian ?l'esf Pattern Provides Key

ETo Good TV Reception

stations '. Chi? teat rn. ma pat med W

test many television stations RPM- eentsthelastwordlnlhGi)'P90l picture that a properly Idiiimd television receiver should be able to reproduce. .-

Thi; type of test pattern has been designed primarily to pro- vide service technicians with a picture which will facilitate the adjustment of receivers and an- tennas during installation and also with a means of locating more easily some of the faults which de- velop in television receivers.

The set owner can also make use of it to judge the performance of ms receiver, and if necessary to make certain minor adj!!!"- ments which may be required from time to time to improve the operation of the set. Without get- ting involved in complicated tech- nical details. let us see what in- formation the test pattern can give us about the operation of a television receiver.

An important factor in the structure of an image is the shape of the frame. The frame adopted for the tclevison image is a rec- tangle having its long dimension in the horizontal direction. The frame dimensions in television are described as the aspect ratio. which is the ratio of the frame width to frame height. This ratio has the standard value of four to three.

USE CIRCLES

In order to make use of the full size of the screen without any masking which results in a its: of part of the picture transmitted by the station, it is important that the receiver be adjusted to reproduce the entire test pattern but without leaving any black border above or below or on either side of the picture.

The two large circles in the cen- he of the pattern are used to ob- tain proper size and aspect ratio: that is. height to width. The out- side diamete of the large circle is three-fourths the pattern width. therefore. when the controls are adjusted so that this circle fills the height of the screen while re- taining a true undistorted circular form. the proper size and the standard aspect ratio of four to three are t hushed. '

It should be noted however that because of therounded corners of the mask which surrounds the pic- ture tube screen on most receivers the small circles in the four cor- ners of the pattern will be partly cut off. Needless to say that the test pattern -must be properly cen- tred on the screen.

The controls which are used to obtain proper framing of the pic- ture are generally located at the rear of the receiver or hidden be- hind a small flap on the front panel. They are usually labelled

"horizontal centreing" "vertical aim" or "height." "horizontal eize" or "width." SYMMETBICAL

You will have noted that the test chart. is symmetrical and that all circles are perfectly formed.

Quite often a well framed teat pat- tern

not correct the circles. particu- larly the large one. will not be round at all-they will be flatten- ed or A'l:omt.he bllnis forming squares ac - of the chart will not all ve equal spacing between them. The controls to correct this con- dition will again usually be found at the rear of the receiver. They are designated: "vertical linear- ity" and "horizontal linearity.” It should be noted that adjust- ment of the linearity controls will generally affect the height a n d width of the picture and as a re- sult it will be necessary to read- just the "vertical" and "horizon- tal size" controls to obtain pro- per framing and size.

Room Plan For Best Television

Is yours a "house divided?" Perhaps a "room divided" is the answer to your needsif your family's interests are varied And you find father no longer has a place to relax while the children are watching television.

Here is a suggestion from Mrs. Vivian Overand. A” ' ' Director

Is

Stars

on the

DENNY

Denny Vaughan Shows.

VAUGHAN

of Home Economics, regarding an interesting use of couches as room dividers, adaptable to many living rooms.

The two couches, placed back- to-back create a television and study area, and set aside the rest of the room for other living-din- ing activities. The arrangement permits double-duty seating - both for TV viewing and for conversa- tion. In this one-room apartment the couches are also used for sleeping.

The TV area centres interest on the table model which is placed on a low table for good visibility. Additional chairs can be drawn up if the group is larger. and "little viewers" might sit on pillows on the floor.

Depth is added to the television area by the mirror hung between the windows. and the drapes can be completely drawn for added coziness. if desired.

The division of a room in this manner is particularly effective in a large living room. because it makes possible smaller con- versational groupings of chairs and couches.

For the smaller living room it makes possible the most efficient use of space for maximum avail- ability.

rive principal sources of in- terference in television recep- tlon'are motor vehicle ignition systems, electrical disturbances from heating appliances and machines. overlapping sig na I s from other television stations, the same for radio stations. and too many television sets in the

TURY , V ACEN oil”

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Shirley Harmer. the songstress from Ontario, who catapulted into international fame last sea- son in New York radio and tele- vision circles, has been signed to star on Canada's headline tele- vision show "Canadian General Electric Showtime."

A top-flight Canadian vocalist at 21, Shirley added the interna- tional lustre to her career when Paul Whiteman heard her sing and a three-year contract for two American networks was forth- coming with two Whiteman-direct ed shows "American Music Hall" and "Paul Whiteman Varieties." Dave Garroway insisted she be a featured performer on his show, and MGM put her on its roster for recordings. As the star of CGE "Showtime." Shirley plans to live in Toronto and commute to New York for her American commit- ments.

EARLY YEARS

Thornton's Corners, Ontario. Shirley's birthplace is a friendly community on the outskirts of Oshawa. where she took her early education in a small two-room school house. and later attended high school in Oshawa. At the age of fifteen, Shirley had an opportunity to work with a local orchestra.

By the time she was in, the band was playing in Toronto and Shirley started taking vocal coach- ing from orchestra leader Art Hallman:

Although she was working full- time in Oshawa. Shirley managed to get her musical career under. way with, the help of parents,

On

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three brothers and two sisters. Her routine was a set pattern, rushing home from work. a quick shower, one sister putting her hair up. while her mother laid out her dress and another sister made a sandwich. A half hour later she would be ready to leave for the singing date. Although bedtime was three a.m. she way always on time for work the next day. Shirley's first radio experience on the CBC Children's Show "Mic- rophone Moppeta." when she was 14, came in 1951. when she sang with Cal Jackson's group in To- ronto. on a program called "Cal's Club." She shared the vocal spot- light with George Murray on a Sunday night show over CFRB Toronto. The summe s e r i e s "Whispering Strings" with Lucio Agostinl's orchestra featured the Harmer voice, and later she had her own 15 minute show on CBC Trans-Canada. FIRST TV BREAK The first television break came appropriately enough on New Year's Eve 1952. with a half-hour musical show, "Four for the Show,” "The Big Revue" and in 1953. Shirley won the top award for the most promising television and rsdlo' performer sharing the honours with actress Kate Bald. in February 1954, in a Man- hattan radio studio, she stepped up on the ABC network micro- Bhone at the beginning of a rilliant international career. the premiere performance of "Paul Whl an's Varieties." from then on -the thrush from'Thornton's

TV Briefs

An error which people some- times make in buying a television -set is to imagine that the size of the room should determine the size of the TV screen. This mis- conception was born of an old idea that proper viewing dis- tance wssgmeasured by placing a chair one foot away from the screen for every inch of screen size. Under the erroneous form- ule a 17-inch screen required a

17-foot distance and a 21-inch screen required a 21-foot dis- tance, etc.

The first system using radio relays to transm it television signals from point to point across the country was developed by RCA scientists and is still in use:

Because television transmits both pictures and sound a sta-

feleviaion magazines call her. gained new fans, new confidence and new contracts with Hollywood checking in on the latest Cana- dian abroad.

According to one American critic: "She sings as if she really meant it, with a pleasant, spon- taneous stage presence. whole- some good looks and plenty of other resources for her promising television career." The Canadian reaction was summed up neatly by The Telegram's Weekend pic- ture magazine's women's editor,

Helen Gougen, "il a r p: e r 'a a u'.','

cat-pest." as American radio and charm

tion needs a channel 6.000 kilo- eycies wide as against only to kilocyclce for a radio station. That cmates a tumendous prob- lem of space on-the airwaves. No one man. company or lab- oratory our claim credit for the development of television. Sets now being installed in homes and other centres. and the tech-

nical station transmitting equip- 1181111118

ment which supplies the pictures

and sound for these receivers - bulb

these are the products of many

minds, and another triumph for mass production.

Children are the most critical and responsive audiences. tele- vision people say. '

On one program recently a be- nevolentg announcer thought it

would be a good idea if the chll- u,

dren would help their mothers with dishes.

Phones rang at the studios from irate mothers who report- ed that their kitchens hadibeen invaded by moppets earnestly trying to help. but only getting under foot.

The first long-distance recep Lion of modern high definition television took place in the Hai- derberg Hills. near Schenectady. on June 10, 1969. There, about LE miles from New York City and almost 8,000 feet below the line of sight. General Electric engineers received pictures of King George and Queen Eliza- beth of England touring the World -rm. - .

in -screen back into the viewors' .tlons try this simple toot: With

piacinglampssothattbeyare reflected fro the television

To eliminate these reflec-

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Avoid placing lamps in front of and so close to tha'set that

brighter than the screen. especial- ly when they are withing the line of vision.

IAJIKGBOUND LIGIITING

the wall which forms a

wall but none mm the view-

er's eyes. Most adults will find the most

to 12 feet from the televison screen. Children should be train- ed to sit at least four feet from

screen as possible. There may be considerable distortion of the picture if viewed from too great an angle. Periodic glances away from the screen are also recom- mended. to relax eye muscles

SETS FOUND IN ODD PLACES Television receivers find their way into surprisingly diverslned places. Among some reported

are. Doctors' and dentlets' offices where patlents' minds are taken off their ailments by a television receiver in the waiting room!

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adjusting the contrast and hr

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